Gardner Color Vector Monitor Display Corrector
Gardner vector displays (such as the WG 6100,
6102, 6400, etc.) use a slightly concave CRT.
Combined with the neck configuration of the tube
results in a visible "bowing" effect
where the side of the screen appears to pinch
inward where straight vertical lines are drawn.
The effect is demonstrated at right.
image to the right is the display
"after" the display corrector is
applied. The board that was used for this picture
did not have the VDR and X-Linearity control
enabled (optional for the user), so the image
quality can be even slightly better that this. (I
don't like having to move the VDR from the Star
Wars board to the Display Corrector so I skip
that step. (Adding the VDR will make the
"diamonds" on the right more linear.)
|The Display Corrector takes the outputs of an
Atari Star Wars or Empire Strikes Back boardset
and applies a mathematical function to correct
for "bowing" on the monitor screen when
these games are used with a Wells Gardner 6100
The Display Corrector can be
used with other game boards that exhibit the same
problem (Major Havoc for example), but the
included documentation is specific to Star
Wars/ESB. Once installed, the Display Corrector
has a noticeable effect of the
"egg-shape" of the Death Star turning
back to a "sphere" and a very positive
effect on the text and graphics quality
throughout the game.
(Display Corrector PCB, Rev. 3.0)
The board includes four
adjustable potentiometers which modify the
X-position, X-width, X-linearity, and the amount
of "correction". There are two power
LEDs which light when +15V and -15V are present.
Installation generally will
require some soldering and is slightly more
involved than just "plug and play".
The Display Corrector is currently priced at $35 plus
© 2002, Clayton Cowgill firstname.lastname@example.org